# MutableFields

`import { MutableFields } from "destack:types";`

Make each field of `T` mutable.

```ds title="MutableFields"
export type MutableFields<T> = { -readonly [K in keyof T]: T[K] }
```

[language/library/src/types/object.ds:32:34](https://github.com/destack-sh/destack/blob/main/language/library/src/types/object.ds#L32-L34)